What we're seeing their temperatures. That start off. Quite cold. And then when the sky clears they dropped fairly rapidly it. If that condition can persist for a few days. The ground chills gets quite cold. The ground itself is radiating away heat into space in to clear space. And by getting very cold on the surface you chill the atmosphere that's next to this very -- This -- -- it's getting very cold into the clear sky conditions. Is denser and starts to slide down this huge dome of Antarctic. What you need is a place where -- -- here is actually caught and held for -- So by causing me -- floated the stationary for an extended period to -- the absolute. Lowest temperatures that were able to --

This transcript has been automatically generated and may not be 100% accurate.

Now Playing: NASA Works to Solve Spacesuit Issues After Successful Spacewalk

Now Playing: Target Customers Have Credit Card Information Stolen

Now Playing: NASA Begins Series of Spacewalks to Fix Space Station Cooling System

Now Playing: NSA Spy Program Could Face Supreme Court Scrutiny

Now Playing: TechBytes: iTunes, Space Monkey

Now Playing: Understanding Antarctica's Extremely Low Temperatures

Now Playing: Social Media Reacts to Nelson Mandela's Death

Now Playing: TechBytes: Tablets as Holiday Gifts

Now Playing: Flailing Arm Tube Man as the New Scarecrow

Now Playing: Hackers Pilfer 2M Facebook, Google Passwords

Now Playing: Stunning Dolphin Megapod Spotted

Now Playing: TechBytes: Hackers, Mobile TV

Now Playing: Woman Ticketed for Driving with Google Glass

Now Playing: TechBytes: Google Field Trip, High-Tech Gifts

Now Playing: Amazon Prime Air Not the Only Drone Delivery on Horizon

Now Playing: Retailers Make Record Sales on Cyber Monday

Now Playing: TechBytes: Google, Volvo

Now Playing: Amazon's Take Down of the iPad Air

Now Playing: Amazon Plans Drone-Delivery Service

Now Playing: Cyber Monday Alert: Beware of Cyber Scams

Now Playing: {{itm.title}}

{"id":21163896,"title":"Understanding Antarctica's Extremely Low Temperatures","duration":"3:00","description":"Ted Scambos, the lead scientist at the National Snow and Ice Data Center in Boulder, Colo., explains the science behind the world's coldest temperatures.","url":"/Technology/video/understanding-antarcticas-extremely-low-temperatures-21163896","section":"Technology","mediaType":"default"}